Portable safe



FIG. 1 is a perspective view of a portable safe, showing the new design;

FIG. 2 is a front view of the portable safe of FIG. 1;

FIG. 3 is a rear view of the portable safe of FIG. 1.

FIG. 4 is a right side view of the portable safe of FIG. 1,

FIG. 5 is a left side view of the portable safe of FIG. 1,

FIG. 6 is a top view of the portable safe of FIG. 1; and,

FIG. 7 is a bottom view of the portable safe of FIG. 1.

The broken lines showing a support to which the portable safe is secured represent environmental structure and form no part of the claimed design. 

The ornamental design for a portable safe, as shown and described. 